Experimental evaluation of eccentric rotational channel-type damping system for vibration control of building structures

2019 ◽  
Vol 23 (2) ◽  
pp. 360-373
Author(s):  
Hyeong-Gook Kim ◽  
Kil-Hee Kim
Keyword(s):  
Test Model ◽  
Building Structures ◽  
Behavior Prediction ◽  
Secondary System ◽  
Passive Dampers ◽  
Scale Test ◽  
Vibration Tests ◽  
Simple Behavior ◽  
Channel Type ◽  
Damping Systems

A theoretical and experimental investigation of an eccentric rotational channel-type damping system is presented. The proposed damping system can incorporate any type of existing passive dampers and provide a wider field of view to residents compared with existing damping systems. Furthermore, the efficiency of the proposed damping system can be magnified by modifying the geometry of the channel-type secondary system. Cyclic loading and free vibration tests of a full-scale test model with steel dampers were conducted to investigate the validity of the suggested simple behavior prediction model and the vibration characteristics of the proposed damping system. The experimental results were in good agreement with the numerical analysis. The results of numerical prediction studies on a single degree of freedom system with the proposed damping system also showed the effect of the eccentric rotational channel-type damping system on seismic response reduction.

Deformation Behavior Prediction of X80 Steel Line Pipe and Implication on High Strain Pipe Specification

2008 ◽  
Author(s):  
Hongyuan Chen ◽  
Lingkang Ji ◽  
Shaotao Gong ◽  
Huilin Gao
Keyword(s):  
Internal Pressure ◽  
Material Properties ◽  
High Strain ◽  
Behavior Prediction ◽  
Buckling Mode ◽  
Line Pipe ◽  
Geometric Imperfection ◽  
China National Petroleum Corporation ◽  
Scale Test ◽  
Pipe Size

The use of strain based design in pipeline technology has been widely discussed during the last decade for pipelines in harsh environment. In such cases pipelines should be designed based on strain criterion. Strain based design poses a number of challenges, particularly on pipe size and material properties. This paper presents preliminary studies on prediction of buckling strain and buckling mode for X80 high-strain line pipe by finite element methods based on full-scale test. The effects of several parameters such as internal pressure, material properties pipe size and geometric imperfection, were investigated to predict the critical strain for 48″ diameter line pipe under compression and pure bending with 12MPa internal pressure. Material parameters of a specification for high strain line pipe were analyzed to promote its application in the 2nd West-East pipeline of China National Petroleum Corporation.

Dynamic Experiments on a 1/4 Scale New-Styled Korean Traditional Wooden House

2014 ◽  
Vol 598 ◽  
pp. 743-746 ◽  
Author(s):  
Yeong Min Kim
Keyword(s):  
Natural Frequency ◽  
Shaking Table Test ◽  
Shaking Table ◽  
Test Model ◽  
Dynamic Tests ◽  
Analysis Model ◽  
Dynamic Experiments ◽  
Wooden House ◽  
Scale Test ◽  
The Impact

This research performed dynamic tests on a 1/4 scale test model of a new-styled Korean traditional wooden house to study its dynamic characteristics. The dynamic tests were performed both by the impact hammer test and the shaking table test of an El-centro N-S seismic wave. Together with these dynamic tests, structural analysis was also performed and the results were compared. The natural frequency from the impact hammer test was slightly higher than that from the shaking table test. The natural frequency from the eigenvalue analysis was about 16~33% lower than that from both the impact hammer test and the shaking table test. It can be deduced that the rotational stiffness of joints of analysis model were somewhat underestimated than those of experiment model.

Large-Scale Test Model of the Progressive Deformation and Failure of Cracked Soil Slopes

2020 ◽  
Author(s):  
Zhi Zhou ◽  
Jiaming Zhang ◽  
Fulong Ning ◽  
Yi Luo ◽  
Lily Chong ◽  
...  
Keyword(s):  
Large Scale ◽  
Test Model ◽  
Progressive Deformation ◽  
Deformation And Failure ◽  
Soil Slopes ◽  
Scale Test ◽  
Cracked Soil

SDC Muon Barrel Toroid 1/9.197 Scale Test Model at SSC

1994 ◽  
pp. 897-900
Author(s):  
C. W. Jeff Tseng ◽  
Y. Gusakov ◽  
J. J. Cherwinka ◽  
R. H. Wands
Keyword(s):  
Test Model ◽  
Scale Test

Experimental Investigation on Effects of Track Configurations on Long-Term Behavior of Ballasted Track

2018 ◽  
Author(s):  
Mancheol Kim ◽  
Deokyong Sung
Keyword(s):  
Effective Area ◽  
Full Scale ◽  
Vehicle Speed ◽  
Behavior Prediction ◽  
Track Geometry ◽  
Ballasted Track ◽  
Maintenance Cycle ◽  
Scale Test ◽  
Long Term Behavior

The track settlement causes the deterioration of track geometry structure. Analysis of track settlement is a significant condition for determining the maintenance cycle. The long-term behavior of ballasted track may vary depending on the combination of the track configurations. In the present study, four ballasted tracks are studied through full-scale experiments to evaluate their respective performance in terms of track settlement. A cyclic load of up to 1.5 million cycles, simulated by vehicle speed of 230 km/h, is been applied to the ballasted tracks. The long-term behavior prediction equations for the ballasted tracks used in Korea are presented in this study. The size of the sleeper and the thickness of ballast are analyzed to be the most influential track configurations for the long-term behavior of ballasted track. Results of the full-scale test presented the effective area between ballast and subgrade is related to the long-term behavior of ballasted track. The track settlement decreases as the effective area between ballast and subgrade increases. Therefore, it is necessary to properly consider the effective area of sleeper and the ballast thickness to inhibit the track settlement.

Sign in / Sign up

Export Citation Format

Share Document